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Linux Foundation

Breaking and Protecting Linux Kernel Stack

Linux Foundation via YouTube

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Overview

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This course examines the history of attacks against the Linux kernel stack and existing protections, then discusses further hardening with RANDOMIZE_KSTACK_OFFSET and its performance implications.

Syllabus

SECURITY
Linux thread stack for x86_64
Buffer overflows
Stack Overflows
Uninitialized Stack
Stackjacking
Inter-stack exploitation
A more recent example
Stack Clash
Basic measures for x86_64
VMAP-based stack
Variable-Length Arrays removal
STACKLEAK and stack initialization
Gap analysis
In-stack randomization: comparison
CONFIG_RANDOMIZE_KSTACK_OFFSET
Performance, performance, performance.....
Discussion & Conclusions
References

Taught by

Linux Foundation

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